Split seals

Where appropriate, insert the spring in the SKF Springlock groove and position the spring connection, so that it is displaced with regard to the seal joint (fig 1). This is standard with all HS8 seals. Put the seal in the correct position on the shaft.

For threaded connectors, back-wind the spring a couple of turns before the ends are brought together and allowed to thread into each other. When using a hook-and-eye connector, draw the ends of the spring together and insert the hook into the eye, taking care not to over-stretch the spring in the process, as this might impair seal performance. When using a control-wire connector, draw the seal ends together and insert the control wire into the centre of the spring coil.

Position the seal joint on the shaft so that it is at the 12 o’clock position and push both ends of the joint into the housing bore (fig 4). Do not push only one joint and then work around the shaft as this will create an excess length, making installation difficult or impossible.

Continue at the 3 and 9 o’clock positions, push the rest of the seal into position (fig 5) and finish simultaneously at the 6 and 12 o’clock positions. For shaft diameters ≥ 1 200 mm (47 in.), it is advisable to fix the seal at the 12, 3, 6 and 9 o’clock positions before locating the remaining sections of the seal.